JPH11192978A - Body lower part reinforcing structure for automobile - Google Patents

Body lower part reinforcing structure for automobile

Info

Publication number
JPH11192978A
JPH11192978A JP36871597A JP36871597A JPH11192978A JP H11192978 A JPH11192978 A JP H11192978A JP 36871597 A JP36871597 A JP 36871597A JP 36871597 A JP36871597 A JP 36871597A JP H11192978 A JPH11192978 A JP H11192978A
Authority
JP
Japan
Prior art keywords
horizontal member
floor panel
side frame
reinforcing plate
vehicle body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP36871597A
Other languages
Japanese (ja)
Other versions
JP3321066B2 (en
Inventor
Yasukazu Fukuda
保和 福田
Haruo Fujita
春男 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP36871597A priority Critical patent/JP3321066B2/en
Priority to GB9805553A priority patent/GB2326853B/en
Priority to MYPI9801208 priority patent/MY120726A/en
Priority to DE1998112679 priority patent/DE19812679B4/en
Priority to KR1019980016597A priority patent/KR100280940B1/en
Publication of JPH11192978A publication Critical patent/JPH11192978A/en
Application granted granted Critical
Publication of JP3321066B2 publication Critical patent/JP3321066B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To form a side frame so as to sufficiently generate plastic deformation by impulsive force at collision time of an automobile, absorb sufficiently energy based on the impulsive force, in this way, suppress effectively deformation of a car room. SOLUTION: A sheet metal-made side frame 13 extended in a longitudinal direction formed with a cross section thereof in almost U shaped is provided, also a floor panel 26 connected to an upper surface of this side frame 13 is provided. The side frame 13 is provided with a tile member 30 extended toward the rear downward and a horizontal member 31 extended from a rear end of this tilt member 30 almost horizontally toward the rearward. In an upper surface of a transition part 32 to the horizontal member 31 from the tilt member 30, the floor panel 26 directly connects a first reinforcing plate 34, on the other hand, in an upper surface of a part in the floor panel 26 corresponding to the horizontal member 31, a second reinforcing plate 35 is provided, these horizontal member 31 floor panel 26 and second reinforcing plate 35 are mutually integrally connected.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、サイドメンバの上
面にフロアパネルを結合させた自動車の車体下部補強構
造に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body lower reinforcement structure in which a floor panel is connected to an upper surface of a side member.

【0002】[0002]

【従来の技術】上記自動車の車体下部補強構造には、従
来、実開平1‐179079号公報で示されたものがあ
る。
2. Description of the Related Art The above-described reinforcement structure for a lower part of a vehicle body is disclosed in Japanese Utility Model Laid-Open Publication No. 1-179079.

【0003】これによれば、車体の下側部を構成し前後
方向に延びてその横断面がほぼU字形状をなす板金製の
サイドフレームが設けられると共に、このサイドフレー
ムの上面にスポット溶接により結合されるフロアパネル
が設けられ、上記サイドフレームが、後下方に向って延
びる傾斜メンバと、この傾斜メンバの後端からほぼ水平
に後方に向って延びる水平メンバとを備え、このフロア
パネルの上側が車室とされている。
[0003] According to this, a side frame made of a sheet metal which constitutes a lower portion of the vehicle body, extends in the front-rear direction, and has a substantially U-shaped cross section is provided, and spot welding is performed on the upper surface of the side frame by spot welding. A floor panel to be connected, wherein the side frame includes a slope member extending rearward and downward, and a horizontal member extending substantially horizontally rearward from a rear end of the slope member; The side is the cabin.

【0004】[0004]

【発明が解決しようとする課題】ところで、自動車が前
進走行時にその前方の物体に衝突(オフセットを含む前
突)して、上記サイドフレームの前端部に後方に向う衝
撃力が与えられたとすると、上記したように、サイドフ
レームは傾斜メンバと水平メンバとを有していて、これ
ら両メンバの間の遷移部は折り曲げられているため、こ
の遷移部に上記衝撃力に基づく応力が集中して、上記遷
移部が容易に屈曲させられるおそれを生じる。
By the way, if the vehicle collides with an object in front of the vehicle when the vehicle is traveling forward (a front collision including an offset), and a rearward impact force is applied to the front end of the side frame, As described above, since the side frame has the inclined member and the horizontal member, and the transition between these two members is bent, the stress based on the impact force concentrates on this transition, This may cause the transition portion to be easily bent.

【0005】一方、上記したように水平メンバはほぼ水
平に延びていることから、後方に向う上記衝撃力を受け
てその長手方向に圧縮力を受けると、大きい半径の円弧
状に曲がろうとする。この場合、水平メンバとこれの上
面に結合させられているフロアパネルとでは、それぞれ
の長手方向における寸法の変化量が異なるため、上記水
平メンバとフロアパネルとの溶接による結合部に剪断力
が生じてこの結合部が容易に破断させられ、上記水平メ
ンバからフロアパネルが容易に剥れ、その分、上記水平
メンバの強度が低下し、もって、この水平メンバが容易
に屈曲させられるおそれを生じる。
[0005] On the other hand, since the horizontal member extends substantially horizontally as described above, when it receives the above-described impact force directed rearward and receives a compressive force in its longitudinal direction, it tends to bend into an arc having a large radius. . In this case, since the horizontal member and the floor panel connected to the upper surface of the horizontal member have different dimensional changes in the longitudinal direction, a shearing force is generated at a joint portion between the horizontal member and the floor panel by welding. The lever is easily broken, and the floor panel is easily peeled off from the horizontal member, and the strength of the horizontal member is reduced accordingly, so that the horizontal member may be easily bent.

【0006】そして、上記したように、衝撃力により上
記遷移部や水平メンバが容易に屈曲させられると、この
サイドフレームの塑性変形量が少なくなって、その分、
上記衝撃力に基づくエネルギーの吸収が阻害され、もっ
て、車室の変形の抑制が阻害されるおそれを生じる。
As described above, when the transition portion and the horizontal member are easily bent by the impact force, the amount of plastic deformation of the side frame decreases, and accordingly,
Absorption of energy based on the impact force is hindered, which may hinder deformation of the cabin.

【0007】本発明は、上記のような事情に注目してな
されたもので、自動車の衝突時、その衝撃力でサイドフ
レームが十分に塑性変形するようにして、上記衝撃力に
基づくエネルギーを十分に吸収させ、もって、車室の変
形をより効果的に抑制させるようにすることを課題とす
る。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and in the event of an automobile collision, the side frame is sufficiently plastically deformed by the impact force, so that the energy based on the impact force is sufficiently provided. It is an object of the present invention to suppress the deformation of the passenger compartment more effectively.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するため
の本発明の自動車の車体下部補強構造は、前後方向に延
びてその横断面がほぼU字形状をなす板金製のサイドフ
レーム13を設けると共に、このサイドフレーム13の
上面に結合されるフロアパネル26を設け、上記サイド
フレーム13が、後下方に向って延びる傾斜メンバ30
と、この傾斜メンバ30の後端からほぼ水平に後方に向
って延びる水平メンバ31とを備えた自動車の車体下部
補強構造において、
According to the present invention, there is provided a vehicle body lower reinforcement structure provided with a sheet metal side frame extending in a front-rear direction and having a substantially U-shaped cross section. In addition, a floor panel 26 is provided to be coupled to the upper surface of the side frame 13, and the side frame 13 is provided with an inclined member 30 extending rearward and downward.
And a horizontal member 31 extending substantially horizontally rearward from the rear end of the inclined member 30.

【0009】上記傾斜メンバ30から水平メンバ31へ
の遷移部32におけるこの遷移部32の上面に直接的に
第1補強板34を結合させる一方、上記水平メンバ31
に対応する上記フロアパネル26の部分の上面に第2補
強板35を設けて、これら水平メンバ31、フロアパネ
ル26、および第2補強板35を互いに一体的に結合さ
せたものである。
At the transition 32 from the inclined member 30 to the horizontal member 31, the first reinforcing plate 34 is directly connected to the upper surface of the transition 32, while the horizontal member 31 is
A second reinforcing plate 35 is provided on the upper surface of the portion of the floor panel 26 corresponding to the above, and the horizontal member 31, the floor panel 26, and the second reinforcing plate 35 are integrally connected to each other.

【0010】[0010]

【発明の実施の形態】以下、本発明の実施の形態を図面
により説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0011】図において、符号1は自動車で、矢印Fr
はその前方を示している。
In FIG. 1, reference numeral 1 denotes an automobile, and an arrow Fr
Indicates the front.

【0012】上記自動車1の車体2は板金製の車体フレ
ーム3と、この車体フレーム3に支持される板金製の車
体本体4とを備え、また、上記車体フレーム3は主フレ
ーム5と、この主フレーム5の前部に支持されるサブフ
レーム6とを有し、上記サブフレーム6に懸架された左
右前車輪7と、上記主フレーム5の後部に懸架された左
右後車輪とで、上記車体2が走行面9上に支持されてい
る。
The vehicle body 2 of the automobile 1 includes a vehicle body frame 3 made of sheet metal and a vehicle body body 4 made of sheet metal supported by the vehicle body frame 3. The vehicle body frame 3 is composed of a main frame 5 and a main frame 5. The vehicle body 2 includes a left and right front wheel 7 suspended on the subframe 6 and a left and right rear wheel suspended on a rear portion of the main frame 5. Are supported on the running surface 9.

【0013】上記車体フレーム3の主フレーム5は、車
体2の車幅方向の車体中央12を挟んで前後方向に延び
る左右一対のサイドフレーム13,13と、これらサイ
ドフレーム13,13のそれぞれ外側方に位置し、それ
ぞれ上記前車輪7と後車輪8との間に位置するサイドシ
ル14と、車幅方向に延びてこれら左右サイドフレーム
13,13と左右サイドシル14,14とを互いにスポ
ット溶接S(主に×印部)により結合させるクロスメン
バ15,17,18とを備え、上記車体2は上記車体中
央12を基準としてほぼ左右対称形とされている。な
お、上記クロスメンバ17は断面が箱形をなしてトルク
ボックスもしくはアウトリガーといわれるものである。
The main frame 5 of the vehicle body frame 3 includes a pair of left and right side frames 13 extending in the front-rear direction across a vehicle body center 12 in the vehicle width direction of the vehicle body 2, and outer sides of the side frames 13, 13. And the side sills 14 located between the front wheel 7 and the rear wheel 8 and extending in the vehicle width direction, and the left and right side frames 13, 13 and the left and right side sills 14, 14 are spot-welded S (mainly). And cross members 15, 17, 18 connected by crosses (X marks), and the vehicle body 2 is substantially symmetrical with respect to the vehicle body center 12. The cross member 17 has a box-shaped cross section and is called a torque box or an outrigger.

【0014】上記各サイドフレーム13は、前後方向に
長く延びる一枚の板金材をプレス成形したもので、左右
に少し離れて互いに対面する一対の側板20,20と、
これら各側板20,20の下端縁同士を互いに一体的に
結合させる底板21と、上記各側板20の上端縁から外
側方に向って一体的に延出する外向きフランジ22とを
有し、その長手方向の各部断面がほぼU字形状をなして
いる。また、上記各サイドシル14は車幅方向で対面す
るアウタパネル24とインナパネル25とで断面箱形に
形成されている。
Each of the side frames 13 is formed by press-molding a single sheet metal material extending long in the front-rear direction.
It has a bottom plate 21 for integrally connecting lower end edges of these side plates 20 and 20 to each other, and an outward flange 22 integrally extending outward from an upper end edge of each side plate 20. Each section in the longitudinal direction is substantially U-shaped. Each side sill 14 is formed in a box shape in cross section by an outer panel 24 and an inner panel 25 facing each other in the vehicle width direction.

【0015】上記車体本体4の下部を構成するフロアパ
ネル26が上記サイドフレーム13の各外向きフランジ
22の上面と、各クロスメンバ16,17の上面に載置
されてこれらにスポット溶接Sにより強固に結合させら
れている。また、上記フロアパネル26の左右各側端縁
は上記サイドシル14のインナパネル25の上下方向の
中途部にスポット溶接Sにより結合させられている。ま
た、上記車体本体4の下部を構成して上記フロアパネル
26の前端側から前上方に向って延びるダッシュパネル
27が設けられ、このダッシュパネル27の下端部は、
上記サイドフレーム13とクロスメンバ17の各上面に
載置されてこれらにスポット溶接Sにより結合させられ
ている。そして、上記フロアパネル26の上方、かつ、
ダッシュパネル27の後方で上記車体本体4の内部が車
室28とされている。
A floor panel 26 constituting a lower portion of the vehicle body 4 is placed on the upper surface of each outward flange 22 of the side frame 13 and the upper surface of each of the cross members 16 and 17 and is firmly attached thereto by spot welding S. Is bound to. The left and right side edges of the floor panel 26 are joined by spot welding S to a vertically intermediate portion of the inner panel 25 of the side sill 14. A dash panel 27 which constitutes a lower portion of the vehicle body 4 and extends forward and upward from a front end of the floor panel 26 is provided.
The side frame 13 and the cross member 17 are mounted on the respective upper surfaces and are joined to each other by spot welding S. And above the floor panel 26 and
The interior of the vehicle body 4 behind the dash panel 27 is a vehicle interior 28.

【0016】上記各サイドフレーム13は、その前部の
一部を構成し後下方に向って斜めに延びる傾斜メンバ3
0と、この傾斜メンバ30の後端からほぼ水平に後方に
向って延びる水平メンバ31とを備えている。
Each of the side frames 13 constitutes a part of a front portion thereof, and the inclined members 3 extend obliquely downward and rearward.
0 and a horizontal member 31 extending substantially horizontally rearward from the rear end of the inclined member 30.

【0017】図1、3、4において、上記傾斜メンバ3
0から水平メンバ31への遷移部32における両外向き
フランジ22,22の上面に直接的に平坦な第1補強板
34が架設されると共に、この第1補強板34が各外向
きフランジ22,22にスポット溶接Sにより結合させ
られている。この場合、サイドフレーム13の各外向き
フランジ22、フロアパネル26の前端部、および第1
補強板34の後端部が三枚重ねとされて一体的にスポッ
ト溶接S1 され、また、サイドフレーム13の各外向き
フランジ22、ダッシュパネル27の後端部、および第
1補強板34の前端部が三枚重ねとされて一体的にスポ
ット溶接S2 され、更に、サイドフレーム13の各外向
きフランジ22、フロアパネル26の前端、ダッシュパ
ネル27の後端、および第1補強板34が四枚重ねとさ
れて一体的にスポット溶接S3 され、もって、上記各部
材が互いに強固に結合させられている。
Referring to FIGS.
A flat first reinforcing plate 34 is provided directly on the upper surfaces of the two outward flanges 22 at the transition portion 32 from 0 to the horizontal member 31, and the first reinforcing plate 34 is attached to each of the outward flanges 22 and 22. 22 are connected to each other by spot welding S. In this case, each outward flange 22 of the side frame 13, the front end of the floor panel 26, and the first
The rear ends of the reinforcing plates 34 are overlapped with one another and spot-welded S 1 integrally, and each of the outward flanges 22 of the side frame 13, the rear end of the dash panel 27, and the first reinforcing plate 34. and the front end portion is a three-ply integrally spot welding S 2, further each outward flange 22 of the side frame 13, the front end of the floor panel 26, the rear end of the dash panel 27, and a first reinforcing plate 34 is a four ply are integrally spot welding S 3, have been, each member is allowed to firmly bond to each other.

【0018】図1、3、5において、上記水平メンバ3
1に対応する上記フロアパネル26の部分の上面に前後
方向に長く延びる第2補強板35が設けられ、これら水
平メンバ31、フロアパネル26、および第2補強板3
5が互いに三枚重ねとされて一体的にスポット溶接Sさ
れ、もって、上記各部材が互いに強固に結合させられて
いる。
1, 3, and 5, the horizontal member 3
A second reinforcing plate 35 extending long in the front-rear direction is provided on an upper surface of a portion of the floor panel 26 corresponding to the horizontal member 31, the horizontal member 31, the floor panel 26, and the second reinforcing plate 3.
The three members 5 are overlapped with each other and spot-welded S integrally, so that the above members are firmly connected to each other.

【0019】全図において、上記構成の自動車1が前進
走行時にその前方の物体に衝突して、上記サイドフレー
ム13の前端部に後方に向う衝撃力が与えられたとする
と、上記したように、サイドフレーム13は傾斜メンバ
30と水平メンバ31とを有していて、これら両メンバ
30,31の間の遷移部32は折り曲げられているた
め、この遷移部32に上記衝撃力に基づく応力が集中し
て、例えば図2の一点鎖線で示すように、上記遷移部3
2が容易に屈曲させられるおそれを生じる。
In all of the drawings, if the vehicle 1 having the above structure collides with an object in front of the vehicle when traveling forward, and a frontward end of the side frame 13 is given a rearward impact force, as described above, The frame 13 has an inclined member 30 and a horizontal member 31. Since a transition portion 32 between the two members 30, 31 is bent, the stress based on the impact force concentrates on the transition portion 32. For example, as shown by a dashed line in FIG.
2 may be easily bent.

【0020】ところで、上記遷移部32に屈曲が生じる
場合には、この遷移部32におけるU字形状の断面が大
きく形状変化させられることとなる。
When the transition portion 32 is bent, the U-shaped cross section of the transition portion 32 is greatly changed.

【0021】そこで、この点に着目して、上記したよう
に、上記遷移部32の上面に第1補強板34を結合さ
せ、しかも、この結合を上記遷移部32に直接施したの
であり、このため、上記遷移部32が効果的に補強され
て、外力による断面変化が防止される。つまり、上記遷
移部32における断面形状の変化を防止させることによ
り、この遷移部32の屈曲が防止される。
Therefore, paying attention to this point, as described above, the first reinforcing plate 34 is coupled to the upper surface of the transition portion 32, and this coupling is directly applied to the transition portion 32. Therefore, the transition portion 32 is effectively reinforced, and a cross-sectional change due to an external force is prevented. That is, by preventing a change in the cross-sectional shape of the transition portion 32, the bending of the transition portion 32 is prevented.

【0022】一方、上記したように水平メンバ31はほ
ぼ水平に延びていることから、後方に向う上記衝撃力を
受けてその長手方向に圧縮力を受けると、例えば図2の
一点鎖線で示すように、大きい半径の円弧状に曲がろう
とする。この場合、水平メンバ31とこれの上面に結合
させられているフロアパネル26とでは、それぞれの長
手方向における寸法の変化量が異なるため、上記水平メ
ンバ31とフロアパネル26とのスポット溶接S4 によ
る結合部に剪断力が生じてこの結合部が容易に破断させ
られ、上記水平メンバ31からフロアパネル26が容易
に剥れ、その分、上記水平メンバ31の強度が低下し、
もって、この水平メンバ31が容易に屈曲させられるお
それを生じる。
On the other hand, since the horizontal member 31 extends substantially horizontally as described above, when it receives the above-described impact force directed rearward and receives a compressive force in its longitudinal direction, for example, as shown by a dashed line in FIG. Then, it tries to bend into a large radius arc. In this case, in the floor panel 26 which is coupled to the upper surface and the horizontal member 31, since the amount of change in dimension in their longitudinal directions are different, by spot welding S 4 between the horizontal member 31 and the floor panel 26 A shear force is generated at the joint, and the joint is easily broken, and the floor panel 26 is easily peeled off from the horizontal member 31, and the strength of the horizontal member 31 is reduced accordingly,
Therefore, there is a possibility that the horizontal member 31 is easily bent.

【0023】しかし、前記したように、水平メンバ31
と第2補強板35とで上記フロアパネル26を挟み付け
て、これらを一体的に結合させたため、上記水平メンバ
31からフロアパネル26が容易に剥れるということは
防止され、つまり、上記フロアパネル26に補強された
状態が上記第2補強板35により保持されて、上記水平
メンバ31が容易に屈曲するということは防止される。
However, as described above, the horizontal member 31
And the second reinforcing plate 35 sandwich the floor panel 26 and integrally connect the floor panel 26 to each other, thereby preventing the floor panel 26 from easily peeling off from the horizontal member 31. The state reinforced by 26 is held by the second reinforcing plate 35, so that the horizontal member 31 is prevented from easily bending.

【0024】よって、上記サイドフレーム13はその全
体が上記衝撃力によって十分に塑性変形させられ、その
分、上記衝撃力に基づくエネルギーが十分に吸収され
て、車室28の変形が効果的に抑制される。
Therefore, the entire side frame 13 is sufficiently plastically deformed by the impact force, so that the energy based on the impact force is sufficiently absorbed and the deformation of the vehicle compartment 28 is effectively suppressed. Is done.

【0025】しかも、上記したように、強度が不十分と
なりがちな、折れ曲がり形状の遷移部32や、水平メン
バ31が上記第1、第2補強板34,35によって補強
されたため、サイドフレーム13の曲げ、ねじりなどに
対する耐力が向上して車体2の強度上有益である。
Further, as described above, the bent transition portion 32 and the horizontal member 31, which tend to have insufficient strength, are reinforced by the first and second reinforcing plates 34 and 35, so that the side frame 13 The strength against bending, torsion and the like is improved, which is beneficial for the strength of the vehicle body 2.

【0026】図1、5において、上記第2補強板35は
その車幅方向の中途部が上方に膨出させられて膨出部3
6が形成されている。この膨出部36により、上記水平
メンバ31と第2補強板35とによる全体的な高さ寸法
が高くされており、これにより、上記衝撃力を受けたと
きの上記水平メンバ31の屈曲がより確実に防止され
て、この水平メンバ31の塑性変形量がより大きくな
る。
In FIGS. 1 and 5, the second reinforcing plate 35 is formed such that a middle portion in the vehicle width direction is bulged upward and the bulging portion 3 is formed.
6 are formed. The overall height dimension of the horizontal member 31 and the second reinforcing plate 35 is increased by the bulging portion 36, whereby the bending of the horizontal member 31 when receiving the impact force is increased. As a result, the amount of plastic deformation of the horizontal member 31 is further increased.

【0027】また、上記第2補強板35の後端部の上面
に前記クロスメンバ18が載置され、これら18,35
と、水平メンバ31およびフロアパネル26とが四枚重
ねとされて一体的にスポット溶接S5 され、これによっ
ても、上記水平メンバ31からフロアパネル26が剥離
するということが防止され、もって、上記水平メンバ3
1が容易に屈曲するということが防止される。
The cross member 18 is mounted on the upper surface of the rear end of the second reinforcing plate 35,
When, with the horizontal member 31 and the floor panel 26 is a four-ply integrally spot welding S 5, which also, the floor panel 26 from the horizontal member 31 is prevented that the peeling, with the above Horizontal member 3
It is prevented that 1 is easily bent.

【0028】図3、5において、上記サイドシル14と
フロアパネル26の端縁部との結合部は、これらに跨る
ように設けられた第3補強板38がスポット溶接S6
れて補強されている。上記自動車1がその外側方からの
衝突等により衝撃力を受けたとき、この衝撃力は上記サ
イドシル14やクロスメンバ17,18により支持され
ると共に、上記第3補強板38で強固に支持されて、車
体本体4の変形が防止され、つまり、車室28の変形が
防止される。
In FIGS. 3 and 5, the joint between the side sill 14 and the edge of the floor panel 26 is reinforced by spot welding S 6 with a third reinforcing plate 38 provided so as to straddle them. . When the automobile 1 receives an impact force due to a collision from the outside or the like, the impact force is supported by the side sill 14 and the cross members 17 and 18 and firmly supported by the third reinforcing plate 38. Thus, deformation of the vehicle body 4 is prevented, that is, deformation of the vehicle interior 28 is prevented.

【0029】[0029]

【発明の効果】本発明による効果は、前後方向に延びて
その横断面がほぼU字形状をなす板金製のサイドフレー
ムを設けると共に、このサイドフレームの上面に結合さ
れるフロアパネルを設け、上記サイドフレームが、後下
方に向って延びる傾斜メンバと、この傾斜メンバの後端
からほぼ水平に後方に向って延びる水平メンバとを備え
た自動車の車体下部補強構造において、
The effect of the present invention is to provide a sheet metal side frame extending in the front-rear direction and having a substantially U-shaped cross section, and a floor panel coupled to the upper surface of the side frame. In a vehicle body lower part reinforcement structure, a side frame includes a slope member extending rearward and downward, and a horizontal member extending substantially horizontally rearward from a rear end of the slope member.

【0030】上記傾斜メンバから水平メンバへの遷移部
におけるこの遷移部の上面に直接的に第1補強板を結合
させる一方、上記水平メンバに対応する上記フロアパネ
ルの部分の上面に第2補強板を設けて、これら水平メン
バ、フロアパネル、および第2補強板を互いに一体的に
結合させてあり、次の効果が生じる。
At the transition from the inclined member to the horizontal member, the first reinforcing plate is directly connected to the upper surface of the transition portion, and the second reinforcing plate is attached to the upper surface of the portion of the floor panel corresponding to the horizontal member. The horizontal member, the floor panel, and the second reinforcing plate are integrally connected to each other, and the following effects are obtained.

【0031】即ち、自動車が前進走行時にその前方の物
体に衝突して、上記サイドフレームの前端部に後方に向
う衝撃力が与えられたとすると、上記したように、サイ
ドフレームは傾斜メンバと水平メンバとを有していて、
これら両メンバの間の遷移部は折り曲げられているた
め、この遷移部に上記衝撃力に基づく応力が集中して、
上記遷移部が容易に屈曲させられるおそれを生じる。
That is, assuming that the vehicle collides with an object in front of the vehicle when the vehicle is moving forward, and a rearward impact force is applied to the front end of the side frame, as described above, the side frame includes the inclined member and the horizontal member. And has
Since the transition between these two members is bent, the stress based on the impact force is concentrated on this transition,
This may cause the transition portion to be easily bent.

【0032】ところで、上記遷移部に屈曲が生じる場合
には、この遷移部におけるU字形状の断面が大きく形状
変化させられることとなる。
When the transition portion is bent, the U-shaped cross section at the transition portion is greatly changed.

【0033】そこで、この点に着目して、上記したよう
に、上記遷移部の上面に第1補強板を結合させ、しか
も、この結合を上記遷移部に直接施したのであり、この
ため、上記遷移部が効果的に補強されて、外力による断
面変化が防止される。つまり、上記遷移部における断面
形状の変化を防止させることにより、この遷移部の屈曲
が防止される。
Therefore, paying attention to this point, as described above, the first reinforcing plate is coupled to the upper surface of the transition portion, and this coupling is directly applied to the transition portion. The transition portion is effectively reinforced, so that a cross-sectional change due to an external force is prevented. That is, by preventing a change in the cross-sectional shape at the transition portion, bending of the transition portion is prevented.

【0034】一方、上記したように水平メンバはほぼ水
平に延びていることから、後方に向う上記衝撃力を受け
てその長手方向に圧縮力を受けると、大きい半径の円弧
状に曲がろうとする。この場合、水平メンバとこれの上
面に結合させられているフロアパネルとでは、それぞれ
その長手方向における寸法の変化量が異なるため、上記
水平メンバとフロアパネルとの結合部に剪断力が生じて
この結合部が容易に破断させられ、上記水平メンバから
フロアパネルが容易に剥れ、その分、上記水平メンバの
強度が低下し、もって、この水平メンバが容易に屈曲さ
せられるおそれを生じる。
On the other hand, since the horizontal member extends substantially horizontally as described above, when it receives the above-described impact force directed rearward and receives a compressive force in its longitudinal direction, it tends to bend into an arc having a large radius. . In this case, since the horizontal member and the floor panel connected to the upper surface of the horizontal member have different dimensional changes in the longitudinal direction, a shear force is generated at the connection between the horizontal member and the floor panel, and The connecting portion is easily broken, and the floor panel is easily peeled off from the horizontal member, and accordingly, the strength of the horizontal member is reduced, so that the horizontal member may be easily bent.

【0035】しかし、前記したように、水平メンバと第
2補強板とで上記フロアパネルを挟み付けて、これらを
一体的に結合させたため、上記水平メンバからフロアパ
ネルが容易に剥れるということは防止され、つまり、上
記フロアパネルに補強された状態が上記第2補強板によ
り保持されて、上記水平メンバが容易に屈曲するという
ことは防止される。
However, as described above, since the floor panel is sandwiched between the horizontal member and the second reinforcing plate and they are integrally connected, the floor panel is easily peeled off from the horizontal member. That is, the state reinforced by the floor panel is held by the second reinforcing plate, thereby preventing the horizontal member from being easily bent.

【0036】よって、上記サイドフレームはその全体が
上記衝撃力によって十分に塑性変形させられ、その分、
上記衝撃力に基づくエネルギーが十分に吸収されて、車
室の変形が効果的に抑制される。
Therefore, the entire side frame is sufficiently plastically deformed by the impact force.
The energy based on the impact force is sufficiently absorbed, and the deformation of the passenger compartment is effectively suppressed.

【0037】しかも、上記したように、強度が不十分と
なりがちな、折れ曲がり形状の遷移部や、水平メンバが
上記第1、第2補強板によって補強されたため、サイド
フレームの曲げ、ねじりなどに対する耐力が向上して車
体の強度上有益である。
Further, as described above, since the bent transition portion and the horizontal member, which tend to have insufficient strength, and the horizontal members are reinforced by the first and second reinforcing plates, the proof strength against bending, twisting, and the like of the side frame is provided. This is beneficial for the strength of the vehicle body.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図1の部分拡大図である。FIG. 1 is a partially enlarged view of FIG.

【図2】車体前部の側面図である。FIG. 2 is a side view of a front portion of a vehicle body.

【図3】車体前部の左半分の平面図である。FIG. 3 is a plan view of a left half of a front portion of a vehicle body.

【図4】図1の4‐4線矢視断面図である。FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

【図5】図1の5‐5線矢視断面図である。FIG. 5 is a sectional view taken along line 5-5 in FIG. 1;

【符号の説明】[Explanation of symbols]

1 自動車 2 車体 3 車体フレーム 12 車体中央 13 サイドフレーム 26 フロアパネル 27 ダッシュパネル 28 車室 30 傾斜メンバ 31 水平メンバ 32 遷移部 34 第1補強板 35 第2補強板 36 膨出部 38 第3補強板 DESCRIPTION OF SYMBOLS 1 Automobile 2 Body 3 Body frame 12 Body center 13 Side frame 26 Floor panel 27 Dash panel 28 Vehicle interior 30 Inclined member 31 Horizontal member 32 Transition part 34 First reinforcing plate 35 Second reinforcing plate 36 Swelling part 38 Third reinforcing plate

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 前後方向に延びてその横断面がほぼU字
形状をなす板金製のサイドフレームを設けると共に、こ
のサイドフレームの上面に結合されるフロアパネルを設
け、上記サイドフレームが、後下方に向って延びる傾斜
メンバと、この傾斜メンバの後端からほぼ水平に後方に
向って延びる水平メンバとを備えた自動車の車体下部補
強構造において、 上記傾斜メンバから水平メンバへの遷移部におけるこの
遷移部の上面に直接的に第1補強板を結合させる一方、
上記水平メンバに対応する上記フロアパネルの部分の上
面に第2補強板を設けて、これら水平メンバ、フロアパ
ネル、および第2補強板を互いに一体的に結合させた自
動車の車体下部補強構造。
1. A sheet metal side frame extending in the front-rear direction and having a substantially U-shaped cross section, and a floor panel coupled to an upper surface of the side frame is provided. And a horizontal member extending substantially horizontally rearward from the rear end of the inclined member, the lower part of the vehicle body reinforcement structure of an automobile, wherein the transition at the transition from the inclined member to the horizontal member is performed. While the first reinforcing plate is directly connected to the upper surface of the portion,
A lower body reinforcement structure for an automobile, wherein a second reinforcing plate is provided on an upper surface of a portion of the floor panel corresponding to the horizontal member, and the horizontal member, the floor panel, and the second reinforcing plate are integrally connected to each other.
JP36871597A 1997-06-30 1997-12-29 Reinforcement structure of lower part of car body Expired - Fee Related JP3321066B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP36871597A JP3321066B2 (en) 1997-12-29 1997-12-29 Reinforcement structure of lower part of car body
GB9805553A GB2326853B (en) 1997-06-30 1998-03-16 Reinforcing structure for substructure of body of automobile
MYPI9801208 MY120726A (en) 1997-06-30 1998-03-19 Reinforcing structure for substructure of body of automobile
DE1998112679 DE19812679B4 (en) 1997-06-30 1998-03-23 Stiffening arrangement for a subassembly of a motor vehicle
KR1019980016597A KR100280940B1 (en) 1997-06-30 1998-05-04 Undercar body reinforcement structure of automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP36871597A JP3321066B2 (en) 1997-12-29 1997-12-29 Reinforcement structure of lower part of car body

Publications (2)

Publication Number Publication Date
JPH11192978A true JPH11192978A (en) 1999-07-21
JP3321066B2 JP3321066B2 (en) 2002-09-03

Family

ID=18492554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP36871597A Expired - Fee Related JP3321066B2 (en) 1997-06-30 1997-12-29 Reinforcement structure of lower part of car body

Country Status (1)

Country Link
JP (1) JP3321066B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007055529A (en) * 2005-08-26 2007-03-08 Mazda Motor Corp Car body structure
JP2011121483A (en) * 2009-12-11 2011-06-23 Mitsubishi Motors Corp Battery unit mounting structure for vehicle
JP2013154880A (en) * 2013-04-12 2013-08-15 Mitsubishi Motors Corp Mounting structure of vehicle battery unit
JP2016097767A (en) * 2014-11-20 2016-05-30 スズキ株式会社 Cab-over vehicle structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007055529A (en) * 2005-08-26 2007-03-08 Mazda Motor Corp Car body structure
JP4725249B2 (en) * 2005-08-26 2011-07-13 マツダ株式会社 Auto body structure
JP2011121483A (en) * 2009-12-11 2011-06-23 Mitsubishi Motors Corp Battery unit mounting structure for vehicle
JP2013154880A (en) * 2013-04-12 2013-08-15 Mitsubishi Motors Corp Mounting structure of vehicle battery unit
JP2016097767A (en) * 2014-11-20 2016-05-30 スズキ株式会社 Cab-over vehicle structure

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